OAKLAND — The Port of Oakland will look to the sky for the energy to power up Oakland International Airport.

As part of its plan to make renewable sources produce 20 percent of its energy, the port wants to contract with SunEdison LLC to build and operate a solar panel field at the airport.

The solar panel field, which would cost almost $5 million over 20 years, will produce one megawatt of electricity a day to the airport, or almost a quarter of the amount the entire complex uses.

Port officials say the field Once completed, the solar panels will cover about 170,000 square feet of space along Ron Cowan Parkway on the airport’s north field. Panels also will be placed on the rooftops of four buildings at the airport.

“Anytime we can conserve, it is a good idea,” said Port Commissioner Darlene Ayers-Johnson. “It’s clean energy.”

Violent police encounters in California last year led to the deaths of 157 people and six officers, the state attorney general’s office said Thursday in a report that provides the first statewide tally on police use-of-force incidents.

At 6:03 p.m. Wednesday, police responded to reports of the robbery at the facility, 2301 Bancroft way, and learned that a man who snuck into the facility and began prowling through the building, taking cell phones and wallets from victims.

Investigators’ efforts to solve the case led to the arrests of Pablo Mendoza, 25, of Hayward, Brandon Follings, 26, of Oakland and Valeria Boden, 26, of Alameda, the Alameda County Sheriff’s Office said Thursday.